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Finding the Fourth Proportional to 205,658.40, 308,487.60 and 122,714.40

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Solution

The fourth proportional to 205,658.40, 308,487.60 and 122,714.40 is: 184,071.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,658.40 : 308,487.60 = 122,714.40 : x
  2. Step 2: Convert to fraction form
    205,658.40/308,487.60 = 122,714.40/x
  3. Step 3: Cross multiply
    205,658.40x = 308,487.60 × 122,714.40
  4. Step 4: Simplify right side
    205,658.40x = 37,855,870,741.44
  5. Step 5: Solve for x
    x = 37,855,870,741.44/205,658.40
  6. Step 6: Final answer
    x = 184,071.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.